Mercury Mountaineer Problem Report
Mercury Mountaineer Plastic Intake Manifold May Crack Causing Coolant Leak
The composite (plastic) intake manifold may crack near the thermostat housing and cause a coolant leak. Ford released an updated manifold that was reinforced to prevent a recurrence. No recall was issued for this problem but Ford did extend the warranty to seven years on some models from the date of purchase.
Driving down the road, pressed gas pedal and white smoke started coming out back. I pulled over and antifreeze was all over the inside of the engine and hood. Looked and intake manifold where thermostat is housed was completely cracked. It's been leaking for the past month causing antifreeze to cause the ignition coils in cylinder 7 and 8 to go bad. Now it's completely cracked. A shame ford never officially recalled this, poor design that is now costing consumers a hefty bill for a new intake manifold to replace something that wasn't manufactured right to begin with! - Visitor
I just purchased this vehicle from a private seller. I saw that it was leaking coolant but got a good price on the mountaineer so purchased it anyway. I took it in to get inspected and had every problem listed on this forum. intake manifold was cracked could not find anywhere but dealer cost 700.00 with labor. It also needed rear bearings and hubs replaced and the back emblem has a crack around it. Total cost to repair all problems 1400.00. That bill should go directly to ford because this is a problem that seems to occur on many of the mountaineers. - Visitor
coolant leak at the thermostat. Replaced intake manifold. $850 incl labor. Shame on Ford. This has been a recurring problem since 1997 at least. Eight years of cracking intake manifolds? Quality is job ZERO. - Visitor
not fixed yet cause i cant afford to at this time - Visitor
This problem will cause water to leak into the cylinders and cause them to miss fire making you think there is a problem with the plugs and coils. The car will run horribly but if you look closer you will find that it is in dead the plastic piece under the thermostat housing. It is a real pain. I am still trying to get his fixed and I am sure it is going to cost me a lot of money because it is no longer under warranty. - Visitor
needs new Intake Manifold gasket. $400 part plus labor. my as well get new thermostat too. $975. - Visitor
heater wasn't working. it's at garage right now and they said the manifold is cracked and need to get part from the Ford dealer. Part alone is $441. Going to cost over $800 for total repair. HAVE to get it fixed because it's leaking antifreeze all over inside. This vehicle has cost me thousands since i drove it off the lot brand new. Sooooo frustrated right now. It also needs new brakes and hub bearings, again. Plus i just put 4 new tires on it last month. It's worse than a new car payment. - Visitor
heater stopped working and brought attention to low coolant. car was also skipping occasionally. when I inspected engine after adding coolant and getting home I found coolant around spark plug. cause of skip. how did the coolant get there? upon further inspection it looked like it was coming from around thermostat.
I thought a gasket maybe. After removing intake manifold I found the problem was not the gasket but a plastic intake that had broken around thermostat. Expensive and time consuming repair. also replaced plugs and the coil pack on the cylinder where the coolant was leaking. continues to run fine now. - Visitor
I'm purchasing a 2002 mercury mountaineer from a in house financing car dealership and after I drove it for bout a week I noticed the truck started running hot and I finally took it to the shop and they told me that the intake manifold is falling apart because its plastic and its getting to hot and they wanted to charge me around 700 dollars to get it fixed - Visitor
Air con problems took to dealer had a crack after $1600.00 now it's works fine and i wasn't told this was a common problem. I had taken my vehicle once before while vehicle was still under warranty and i was told all was repaired even though it wasn't. - Visitor
cracked manifold thermostat housing. Tried to stop the leak with liquid weld--no good. As soon as the car heats up it breaks the welding. - Visitor
One morning I was warming up my 2002 Mercury Mountaineer and noticed a funny smell and a stream of water leaving my drive-way. The temperature gradually began to elevate the typical half marker. I haven't move or driven the truck since. I enjoy the comfort a drivability of this vehicle but over all since I've been in ownership there have been several issues. Ex; Gas needle non-operable, no day time running lights, fog light shortage, door-open alert and interior light, lack of radio volume control, ball joint and rotor issues(right wheel shakes during breaking),Transmission slip due to leak,(trans. pan seal, trans. pan strainer). - Visitor
Less than 30 days of buying vehicle. Lost heat. Loosing coolant. Local mechanic ran a pressure test. And $700.00 later it was fixed. Have had nothing but problems since. - Visitor
Did not fixed yet. Need to do it. - ioli
Manifold melted last year (2013) and possibly doing it again this year 2014. Have service appointment, leaking coolant. Had radiator replaced and hoses. I was told by two independent mechanics that there is a design flaw and Ford should have done a recall. From what I am hearing I was lucky to even have it last as long as it did. - Visitor
Cracked intake manifold leaking coolant into #5 and #8 spark plug wells. Replaced intake manifold with new, updated metal front coolant tube from Ford. - Visitor
coolant leakage cause damage to my vehicle during travel and now the motor is bad. - Visitor
happened twice in 3 months! This car was great when bought new. All the money I spent on repair is outrageous! Should've got rid of it when the first repair was needed. I probably own a Mercedes by now! - Visitor
Had the same problem twice, but most of all it's the damn fan clutch I have the problem with. In 2 months, broke "3" times!!! - Visitor
Same problem as most others. Notice a miss in one of the cylinders. Took it to the garage to diagnose further. Reported to be the plastic piece of the intake manifold. Really???? A plastic piece on the motor of a car that is constantly heated to high temperatures? Nothing further needs to be said there.. - Visitor
The intake manifold O-ring gaskets commonly leak, causing stalling and poor idle quality; the C...
97 has a whole top center and 99 is blank between the 8 input orifices.
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I have a 1998 Mercury Mountaineer with an exhaust manifold leak.